Drafting roller construction

ABSTRACT

An improved drafting roller construction for drafting textile fibers and comprising an elongated supporting roller having an outside cylindrical surface and spaced annular grooves extending inwardly from the outside surface and a sleeve-like cot having an inside surface defined by a plurality of alternating channels and projections extending substantially along its full length with adhesive means between the inside and outside surfaces fixing the cot and roller together in a high-strength manner.

United States Patent [11] 3,763,532 Smith Get. 9, 1973 [54] DRAFTING ROLLER CONSTRUCTION FOREIGN PATENTS OR APPLICATIONS [75] lnvemofi Kenneth Smilh Westhoughton 1,059,659 11/1953 France 29/129.5 n o o g a 384,426 12/1932 Great Britain 29/1295 [73] Assignee: Dayco Corporation, Dayton, Ohio Primary Examiner-Alfred R. Guest [22] F'led: June 1972 Attorney-Reuben Wolk [21] Appl. No.: 259,647

[57] ABSTRACT U68 Cl. An improved drafting roller construction for drafting [51] Int. Cl B211) 31/08 t til fib rs and comprising an elongated supporting Fleld of Search n 110, roller having an outside cylindrical surface and spaced 29/132 annular grooves extending inwardly from the outside surface and a sleeve-like cot having an inside surface References cued defined by a plurality of alternating channels and pro- UNITED STATES PATENTS jections extending substantially along its full length 1,384,806 7/1921 Reed 29/129 with adhesive means between the inside and Outside 1,403,327 2/1922 Wilson et al 29/129 surfaces fixing the cot and roller together in a highl,569,826 1/1926 Merrill 29/129 X strength manner. 1,718,415 6/1929 Gowans 29 129 x 2,185,766 1/1940 Higby 29/130 x 11 Clams 5 Drawlng Figures DRAFTING ROLLER CONSTRUCTION BACKGROUND OF THE INVENTION In the drafting or drawing of textile fibers to produce yarn, sliver, roving, and the like, roller devices have been used previously which are comprised of an elongated supporting roller having a radially stretchable tubular cot adhesively fastened in position therearound utilizing various types of adhesive. The usual practice in fixing the cot against such supporting roller is to coat either the outside surface of the roller or an associated inside surface of the cot, or both, with a solvent-type adhesive whereupon the sleeve-like cot is slid axially in position over the cylindrical roller. To provide adhesion of the cot to the roller in these previous devices, the inside surface of the cot normally has a diameter which is smaller than the diameter of the outside surface of the roller and as the cot is pushed into position it stretches around such roller. However, this axial sliding procedure generally results in substantial quantities of adhesive being removed from the adjoining inside and outside surfaces so that the adhesive that remains therebetween may be insufficient to assure an adequate bonding of the cot to its roller. Further, in present systems comparatively great pressures are exerted on the outside surface of each cot during the drawing of textile fibers thereover and because of the poor bond between each cot and its roller the cot may separate from its roller.

SUMMARY This invention provides an improved drafting roller construction which comprises an elongated supporting roller having an outside cylindrical surface and a pinrality of axially spaced circumferential grooves extending inwardly from the outside surface and the construction also comprises a cot having an inside surface defined by a plurality of continuous alternating channels and projections extending along its full length. The cot is fixed to the roller with adhesive means which also defines a plurality of high strength ridges on the roller and a plurality of interlocks with each interlock extending into the cot and roller at the junction of each groove and channel to assure that the cot is fixed securely in position relative to the roller.

Other details, uses, and advantages of this invention will be readily apparent from the exemplary embodiments thereof presented in the following specification, claims, and drawing.

BRIEF DESCRIPTION OF THE DRAWING FIG. 2 is a perspective view illustrating the roller and cot of FIG. 1 after assembly thereof;

FIG. 3 is a fragmentary cross-sectional view taken essentially on the line 3--3 of FIG. 2;

FIG. 4 is a fragmentary cross-sectional view taken essentially on the line 4-4 of FIG. 2;

FIG. 5 is a perspective view similar to FIG. 1 illustrating a fragmentary portion of a supporting roller and a cot having an inside surface defined by a plurality of channels and projections which extend in a substantially helical path around the longitudinal axis of such cot; and

FIG. 6 is a perspective view illustrating another exemplary embodiment of a supporting roller which may be used interchangeably with either the supporting roller of FIG. 1 or FIG. 5.

DESCRIPTION OF ILLUSTRATED EMBODIMENTS Reference is now made to FIG. 2 of the drawing which illustrates one exemplary embodiment of a drafting or drawing roller construction of this invention which is designated generally by the reference numeral 10 and the construction 10 is particularly adapted for the drafting or drawing of textile fibers or the like to produce sliver, roving, yarn, etc., in accordance with techniques which are well known in the textile industry.

The construction 10 comprises an elongated supporting roller 11, see FIG. ll, having an outside right circular cylindrical surface 12 and a plurality of axially spaced circumferential grooves 13 extending inwardly from the surface 12. The exemplary roller 11 may have a pair of shaft portions each designated by the reference letter S extending from its opposite ends and such shaft portions have a right circular cylindrical configuration and may be provided as an integral part of the roller 11 as a single piece construction or provided as separate members and suitably fixed thereto using any technique known in the art. The shaft portions S rotatably support the roller 11 and hence the entire construction 110 in a manner which is well known in the art and on associated supporting structure.

A textile cot 14 is provided and has an inside surface designated generally by the reference numeral 15 and such surface is defined by a plurality of parallel alternating channels 16 and projections 17 which in this example extend along the full axial length of the cot l4 and parallel to a central longitudinal axis A of the cot which is also the longitudinal axis of the construction 10. The cot l4 and roller 11 are fixed together by a suitable adhesive means or adhesive and as will now be described in detail.

With the cot l4 installed in position adhesive 20 is forced into the space defining channels 16 and such adhesive adheres tenaciously to the roller 11 and defines a plurality of high strength ridges 21 of adhesive with each ridge having an inverted configuration defined by the configuration of an associated groove 16 and in this example such configuration is an inverted V-shaped configuration, see FIGS. 3 and 4. The adhesive 20 also provides an interlocking adhesive structure or interlock 22 at the junction of each groove 13 and channel 16 and each adhesive structure 22 extends into both the cot l4 and roller 11. Thus, the adhesive 20 provides an define the entire inside surface 15 of the cot 14 as an undulating or saw-toothed surface. However, it will be appreciated that the channels 16 need not necessarily be provided so that they cooperate with projections or ridges 17 to define a saw-toothed surface but such channels and ridges may be provided to define toothed surfaces having other configurations and the channels may be spaced at comparatively wide intervals, if desired.

The grooves 13 are provided in the cylinder or roller 11 along substantially the full axial length thereof and each immediately adjacent pair of grooves may be spaced the same axial distance 24 along the roller. Each groove 13 may have a roughly semicircular crosssectional configuration, as illustrated at 25 in FIG. 3, or may have any suitable polygonal cross-sectional configuration, such as rectangular, for example.

Another exemplary embodiment of the roller construction of this invention is illustrated in FIG. of the drawing. The roller construction illustrated in FIG. 5 is very similar to the roller construction therefore, such roller construction will be designated generally by the reference numeral 10A and parts of the construction 10A which are similar to corresponding parts of the construction 10 will be designated by the same reference numeral as in the construction 10 also followed by the letter designation A and not described again. Only those component parts or portions which are different from corresponding parts of the construction 10 will be designated by a new reference numeral also followed by the letter designation A and described in detail.

The construction 10A differs from the construction 10 primarily in the inside surface A of the cot 14A. In particular, instead of having channels and projections which extend in parallel relation about a central longitudinal axis A, it will be seen that the cot 14A has channels 26A and projections 27A which extend in a substantially helical or spiral path around such longitudinal axis. The roller 11A is substantially identical to the roller 11 and has grooves 13A which extend inwardly therein from its cylindrical surface 12A; and, roller 11A also has either integral or detachably fixed shaft portions S extending from its opposite ends.

Each roller 11 and 11A may be made of any suitable high strength material and is preferably made of a suitable metallic material such as steel. Further the main central portion of each roller 11 and 11A may be provided as a single piece structure and has its respective grooves 13 and 13A suitably formed therein by machining or the like.

The main central portion of roller 11 or 11A need not necessarily be provided as a single piece construction, with shaft portions S extending from its opposite ends, but such roller may be modified so that it is defined by a plurality of components and such a modified roller is shown in FIG. 6 of the drawing and designated by the reference numeral 11M. The roller 11M is substantially identical to the rollers 11 and 11A as to its functional or operating characteristics and hence may be used interchangeably therewith; however, such roller has a central core 30M and a tubular sleeve 31M detachably fixed concentrically around the core 30M.

The core 30M and sleeve 31M are made of suitable high strength materials and the sleeve 31M is detachably fixed concentrically around and coaxially with the core 30M by a plurality of fastening devices 32M which may be in the form of pins, screws, or the like which hold the sleeve 31M in position against radial and axial movements. The sleeve 31M has an outside right circular cylindrical surface 12M and a plurality of annular grooves 13M which extend inwardly from such surface and the grooves 13M are arranged in equally spaced relation along the roller 11M.

Each cot 14 and 14A may be made of any suitable material in accordance with techniques known in the textile industry and with such material being of the type which is suitable for drafting or drawing textile fibers. However, each cot l4 and 14A is preferably made of a resilient elastomeric material having elastic properties and materials which have been employed for this purpose are suitable polymers as well as natural and synthetic rubber compounds. The grooves and projections defined in each cot 14 or 14A may be suitably formed therein during the process of making the cot or may be formed therein subsequently, as desired.

The adhesive means or adhesive 20 is employed for fixing each cot to its associated roller, regardless of whether construction 10 or 10A is considered, and adhesive 20 may be of any suitable type which is capable of providing high strength ridges 21 of adhesive or high strength interlocks 22. In one application of this invention, the adhesive 20 was in the form of an epoxy resin type adhesive and provided satisfactory results.

While present exemplary embodiments of this invention, and methods of practicing the same, have been illustrated and described, it will be recognized that this invention may be otherwise variously embodied and practiced within the scope of the following claims.

What is claimed is:

1. In combination: an elongated supporting roller having an outside right circular cylindrical surface and a plurality of axially spaced circumferential grooves extending inwardly from said outside surface, a textile cot having an inside surface defined by a plurality of alternating channels and projections extending substantially along its full length transverse of said grooves, and adhesive means fixing said roller and cot together, said adhesive means also defining a plurality of high strength ridges on said roller and a plurality of interlocks with each interlock extending into said cot and roller at the junction of each groove and channel to assure said cot is fixed securely in position relative to said roller.

2. A combination as set forth in claim 1 in which each of said channels and projections has a roughly V- shaped configuration when viewed from an end thereof.

3. A combination as set forth in claim 1 in which said grooves are spaced equal distances along said roller and each groove has a roughly semicircular crosssectional configuration.

4. A combination as set forth in claim 1 in which each of said channels and projections has a roughly V- shaped configuration when viewed from an end thereof, each immediately adjacent pair of grooves is spaced the same distance along said roller, and each groove has a roughly semicircular cross-sectional configuration.

5. A combination as set forth in claim 1 in which said cot has a central longitudinal axis and is made of a single piece of an elastomeric material, and said channels and projections extend parallel to said longitudinal axis.

6. A combination as set forth in claim 1 in which said cot has a central longitudinal axis and is made of a single piece of an elastomeric material and said channels and projections extend in a substantially helical path around said longitudinal axis.

7. A combination as set forth in claim 1 in which said roller has a central core and a tubular sleeve detachably fixed concentrically around said core, said sleeve having said outside surface and said grooves provided therein.

8. A combination as set forth in claim 1 in which each of said grooves is arranged in a plane which extends substantially perpendicular to a longitudinal axis said cot is made of a rubber compound. 

1. In combination: an elongated supporting roller having an outside right circular cylindrical surface and a plurality of axially spaced circumferential grooves extending inwardly from said outside surface, a textile cot having an inside surface defined by a plurality of alternating channels and projections extending substantially along its full length transverse of said grooves, and adhesive means fixing said roller and cot together, said adhesive means also defining a plurality of high strength ridges on said roller and a plurality of interlocks with each interlock extending into said cot and roller at the junction of each groove and channel to assure said cot is fixed securely in position relative to said roller.
 2. A combination as set forth in claim 1 in which each of said channels and projections has a roughly V-shaped configuration when viewed from an end thereof.
 3. A combination as set forth in claim 1 in which said grooves are spaced equal distances along said roller and each groove has a roughly semicircular cross-sectional configuration.
 4. A combination as set forth in claim 1 in which each of said channels and projections has a roughly V-shaped configuration when viewed from an end thereof, each immediately adjacent pair of grooves is spaced the same distance along said roller, and each groove has a roughly semicircular cross-sectional configuration.
 5. A combination as set forth in claim 1 in which said cot has a central longitudinal axis and is made of a single piece of an elastomeric material, and said channels and projections extend parallel to said longitudinal axis.
 6. A combination as set forth in claim 1 in which said cot has a central longitudinal axis and is made of a single piece of an elastomeric material and said channels and projections extend in a substantially helical path around said longitudinal axis.
 7. A combination as set forth in claim 1 in which said roller has a central core and a tubular sleeve detachably fixed concentrically around said core, said sleeve having said outside surface and said grooves provided therein.
 8. A combination as set forth in claim 1 in which each of said grooves is arranged in a plane which extends substantially perpendicular to a longitudinal axis through said roller.
 9. A combination as set forth in claim 1 in which said adhesive means comprises an epoxy resin type adhesive.
 10. A combination as set forth in claim 1 in which said supporting roller is made of metal, said cot is a sleeve-like member made of a single piece of elastomeric material, and said adhesive means comprises an epoxy resin.
 11. A combination as set forth in claim 1 in which said cot is made of a rubber compound. 